Improvement in wrench



para can.

` I, CHARLES H. MILLER, of the city of Bualo, in the county of Erie and` State of New York', have invented anv Improved Wrench, of which the following is a specification. i y `llyimproved wrench belongs 'to that class in which i the instruments are made in`halves, both ends of which terminate in jaws, so that when the halves orcounterparts areput together al double wrench, or two sets of jaws, one at each end, will be `formed, the jaws of the Mone-halt' adjusting longitudiuallyto or from those of `the other. y y i j "My invention consis i l y p First, in uniting the two halves by means of a dove tail pin or guide,`.cast atthe end ot' each halt', which slides and adjusts in a slot formed in the contiguous i portion, the slots beingjenlarged at onev end, toV per- 'mit the insertion ot"tllehead ofthe guides or 'dovetails, whereby a cheap and lstrong connection is provided, without the necessity ot' any of the parts projecting beyond the surface of the wrench. `bccond, in;thearrangement ot' a stop-pin or screw, j, `which ispasscd through the side of one of the bars into the enlargement of one of the slots, after the two bars have been connected together, so as to prevent their accidelitalSeparation. F v

Third, in the arrangement with a wrench. made in! halves, so as to adjust,iby sliding longitudinally, of teeth orratchets formed `on the inner and contiguous face of the one halt', and a spring -pawl arranged and concealed iu.a recess cast in `the innercontiguons face y oi' the opposite half, whereby'the adjustment of the i jaws is most readily and Iconveniently effected byone hand by simply pressing with the thumb or h'nger on a projecting knob, the only part of' the wrench which projectsbeyond its surface.

In the accompanying,drawing- Figure I is a side elevation;

`Figure `Il is, a longitudinal section; and Figure III, an edge `view ot' my improved wrench. Like letters of r `terencedesignate like parts in each ofthe figures. y i

A A are the two halves of the wrench, cach `cast with `a jaw, a, projecting at right angles from one end, which forms the outer jaw of each wrench, while the oppositcend b of' each halt' is widened and faced, so i that when the parts are arranged together, it will-form `the innerjawot' each set, as clearly shown.`

Cis the dovetail` or` guide, projecting from the inner end of each portion A. v l, `D is the corresponding slot formed in t-lie opposite ends; y

(l, the` enlargement at one end of the slot, to admit the head ofthe guide; and

jaws.

` CHARLES H, MILLER, or Barrato, NEW Youre AssIeNoRro HIMs'nLr L y AunMIcHAEL DOLL, or SAME PLAGE.

" Letters Patent No. 105,827, dated. July 26, 1870.

IMPROVEMNT IN WRENCH.

4.'lfhe Schedule referred to in'these Letters Patent and making part of the same.

d', the countersink or widening ot the slot at the outer edge, to receive the ange projections c of the dovetail, which project outward, so as to be only flush with the edge of the wrench.

The parts are united by inserting the heads of the dovetails through the enlarged opening d, and then sliding the parts longitudinally, soas to engage the auges c with the edges of the slots or shoulders formed by the countersink t -Aftcr the bars A A are connected together, as4 above described, I pass a screw or pin, n, through the` sides of the slotted bar, so as to obstruct one o t' the enlargements d of the slots, and stop the movement of the dovetails before they suieiently enter the enlargement to permit of their detachment therefrom.`

,'1) is a pawl-lever, pivoted in a recess, F, cast in the i edge of one of the portions A of the wrench.

y is a spiral spring, arranged so as` to press the pawl againstthe ratchets t, formed in the contiguous face ot' the opposite portion A; and

mis a pin, projecting outward from the end ot the pawl-lever, and provided with a knob at its end, which,

` being pressed inward by the thumb or nger, releases the `pawl from engagement with the ratchets opposite.

The construction of 'the teeth or ratchets 'i permit the pawl to slip over them, as' the parts A A are slid inthe direction for closing the jaws, while the pawl engages therewith, and prevents the separation ofthe lMy improved wrench is easily handled and adj usted, possesses a smooth exterior, while the means forconnecting the parts and locking themin place are arrangedinside, so as to be protected from inj ury,there by rendering the wrench more durable,.smoother to handle, and' ueater in appearance.

What I claim as my invention is 1. The combination and arrangement, with the wrench-bars A A, of the dovetail guides C and slots l), provided with enlargement d, for uniting the said and operated substantially in the manner and for the purpose hereinbefore set forth.

CHARLES H. MILLER.

` Witnesses: y

` JNO. J. BONNER,

Vieron H.' BECKER. 

